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PDF MC33151 Data sheet ( Hoja de datos )
| Número de pieza | MC33151 | |
| Descripción | (MC34151 / MC33151) High Speed Dual MOSFET Drivers | |
| Fabricantes | ON Semiconductor | |
| Logotipo |  |
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MC34151, MC33151
High Speed Dual
MOSFET Drivers
The MC34151/MC33151 are dual inverting high speed drivers
specifically designed for applications that require low current digital
circuitry to drive large capacitive loads with high slew rates. These
devices feature low input current making them CMOS and LSTTL
logic compatible, input hysteresis for fast output switching that is
independent of input transition time, and two high current totem pole
outputs ideally suited for driving power MOSFETs. Also included is
an undervoltage lockout with hysteresis to prevent erratic system
operation at low supply voltages.
Typical applications include switching power supplies, dc to dc
converters, capacitor charge pump voltage doublers/inverters, and
motor controllers.
These devices are available in dual–in–line and surface mount
packages.
• Two Independent Channels with 1.5 A Totem Pole Output
• Output Rise and Fall Times of 15 ns with 1000 pF Load
• CMOS/LSTTL Compatible Inputs with Hysteresis
• Undervoltage Lockout with Hysteresis
• Low Standby Current
• Efficient High Frequency Operation
• Enhanced System Performance with Common Switching Regulator
Control ICs
• Pin Out Equivalent to DS0026 and MMH0026
Representative Block Diagram
VCC 6
Logic Input A
2
+
+
+
+
–
5.7V
+
Drive Output A
7
Logic Input B
4
+
+
Drive Output B
5
Gnd 3
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8
1
PDIP–8
P SUFFIX
CASE 626
MARKING
DIAGRAMS
8
MC3x151P
AWL
YYWW
1
8
1
SO–8
D SUFFIX
CASE 751
8
3x151
ALYW
1
x = 3 or 4
A = Assembly Location
WL, L = Wafer Lot
YY, Y = Year
WW, W = Work Week
PIN CONNECTIONS
N.C. 1
Logic Input A 2
Gnd 3
Logic Input B 4
8 N.C.
7 Drive Output A
6 VCC
5 Drive Output B
(Top View)
ORDERING INFORMATION
Device
Package
Shipping
MC34151D
SO–8
98 Units/Rail
MC34151DR2
SO–8
2500 Tape & Reel
MC34151P
PDIP–8
50 Units/Rail
MC33151D
SO–8
98 Units/Rail
MC33151DR2
SO–8
2500 Tape & Reel
MC33151P
PDIP–8
50 Units/Rail
MC33151VDR2 SO–8
2500 Units/Rail
© Semiconductor Components Industries, LLC, 2000
April, 2000 – Rev. 1
1
Publication Order Number:
MC34151/D
1 page  
MC34151, MC33151
80
VCC = 12 V
VIN = 0 V to 5.0 V
60 TA = 25°C
40
20 tf
tr
0
0.1 1.0
CL, OUTPUT LOAD CAPACITANCE (nF)
Figure 13. Drive Output Rise and Fall Time
versus Load Capacitance
10
80
Both Logic Inputs Driven
0 V to 5.0 V,
60
50% Duty Cycle
Both Drive Outputs Loaded
TA = 25°C
1 – VCC = 18 V, CL = 2.5 nF
40 2 – VCC = 12 V, CL = 2.5 nF
3 – VCC = 18 V, CL = 1.0 nF
4 – VCC = 12 V, CL = 1.0 nF
20
1
2
3
4
80
VCC = 12 V
Both Logic Inputs Driven
60
0 V to 5.0 V
50% Duty Cycle
Both Drive Outputs Loaded
TA = 25°C
40
f = 500 kHz
20
f = 200 kHz
f = 50 kHz
0
0.1 1.0 10
CL, OUTPUT LOAD CAPACITANCE (nF)
Figure 14. Supply Current versus Drive Output
Load Capacitance
8.0
TA = 25°C
6.0
Logic Inputs at VCC
Low State Drive Outputs
4.0
Logic Inputs Grounded
High State Drive Outputs
2.0
0
10 k
100 1.0 M
f, INPUT FREQUENCY (Hz)
Figure 15. Supply Current versus Input Frequency
0
0 4.0 8.0 12 16
VCC, SUPPLY VOLTAGE (V)
Figure 16. Supply Current versus Supply Voltage
APPLICATIONS INFORMATION
Description
The MC34151 is a dual inverting high speed driver
specifically designed to interface low current digital
circuitry with power MOSFETs. This device is constructed
with Schottky clamped Bipolar Analog technology which
offers a high degree of performance and ruggedness in
hostile industrial environments.
Input Stage
The Logic Inputs have 170 mV of hysteresis with the input
threshold centered at 1.67 V. The input thresholds are
insensitive to VCC making this device directly compatible
with CMOS and LSTTL logic families over its entire
operating voltage range. Input hysteresis provides fast
output switching that is independent of the input signal
transition time, preventing output oscillations as the input
thresholds are crossed. The inputs are designed to accept a
signal amplitude ranging from ground to VCC. This allows
the output of one channel to directly drive the input of a
second channel for master–slave operation. Each input has
a 30 kΩ pull–down resistor so that an unconnected open
input will cause the associated Drive Output to be in a known
high state.
Output Stage
Each totem pole Drive Output is capable of sourcing and
sinking up to 1.5 A with a typical ‘on’ resistance of 2.4 Ω at
1.0 A. The low ‘on’ resistance allows high output currents
to be attained at a lower VCC than with comparative CMOS
drivers. Each output has a 100 kΩ pull–down resistor to keep
the MOSFET gate low when VCC is less than 1.4 V. No over
current or thermal protection has been designed into the
device, so output shorting to VCC or ground must be
avoided.
Parasitic inductance in series with the load will cause the
driver outputs to ring above VCC during the turn–on
transition, and below ground during the turn–off transition.
With CMOS drivers, this mode of operation can cause a
destructive output latch–up condition. The MC34151 is
immune to output latch–up. The Drive Outputs contain an
internal diode to VCC for clamping positive voltage
transients. When operating with VCC at 18 V, proper power
supply bypassing must be observed to prevent the output
ringing from exceeding the maximum 20 V device rating.
Negative output transients are clamped by the internal NPN
pull–up transistor. Since full supply voltage is applied across
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5
5 Page 
Notes
MC34151, MC33151
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11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet MC33151.PDF ] | |
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